I haven't experienced the mil guys at UPS yet, but the mil guys at Omni were very cool, in the aggregate (as were the civ types, I should add). I flew with a street C/A who had been a test pilot in the F-14, and a young guy (like 30s, this seems young to me now) who had been a U-2 pilot, and neither of them really talked about it unless directly asked. I think that stuff is cool as heck (since hell is presumably not at all cool), so I asked; But if I hadn't, I don't think they'd have said a word. I'm sure the guys who have a "my other car is an F-15" license plate holder on their Vette and look at civilian-trained guys like something they scraped off their shoe are out there, but so far I haven't met them. I realize that the mil/civ ratio is a lot higher at UPS, so maybe I will join you guys in the irritation-line eventually. Then again, maybe not, because, as I said, I happen to think that stuff is cool if the person who did it doesn't believe it makes them of Higher Stock.
To the hiring subject, to the extent that UPS is similar to a Legacy in being a "destination job", and that is obviously subject to one's personal preferences, in my class of I think 24 (something like that), there were two regional pilots. One obviously had a BIG "in", and the other checked a minority applicant box (I have zero problem with this and do not want to start some hideous APC dogwhistle pursefight, but it goes to the larger point) AND was an LCA. Two were HIGHLY experienced 91 guys with scads of types and I believe in both cases some management experience. The other 20 of us were either military, ACMI, or both. The moral being, at least from my perspective, that (at least apocryphally, in one class, at one airline) you might have to leave your safe place to get where you want to be. Take it for what it's worth, which is probably about what you paid for it.